Developer, documenter, trainer, and user experience advocate who puts core usability principles at the forefront of design.

The greatest obstacle to usability is the expert. When I design an interface, or produce a manual, or provide a tutorial, the first thing I do is fade myself out of the way. I am naught. I do not exist. Only the user exists. 

Scientists have shown that 99.831% of people who quote the above passage don't have the slightest clue what it means.